06/30/21

thermochemistry
Calculate the grams of Ca(s) produced when 1.65 Amperes are passed through the cell shown below for 4.96 hours. Ca+2(aq)+2Cl−1(aq)→Ca(s)+Cl2(g)
Follows • 1
Expert Answers •1

06/22/21

Chemistry 122 d
Calculate the number of moles in 10.0 g ammonia
Follows • 1
Expert Answers •1

06/21/21

Chemistry Question
Determine the volume of a mixture of 0.04 mol of nitrogen and 0.001 mol of oxygen at SATP.
Follows • 1
Expert Answers •2

06/18/21

Calculate the calories needed to heat 6.4 g of water from 15°C to 34°C. Express your answer to two significant figures.

Follows • 1
Expert Answers •1

06/18/21

Vanillin is a common flavouring agent used in foods..
Vanillin is a common flavouring agent used in foods. This compound consists of 63.15 % C, 5.30 % H, 31.55 % O. Its molar mass is 152 g/mol. Determine both its empirical formula and its molecular... more
Follows • 1
Expert Answers •1

06/18/21

Para-dichlorobenzene
Para-dichlorobenzene is an ingredient in mothballs that has a molar mass of 147.00 g/mol and an empirical formula of C3CLH2. What is its molecular formula
Follows • 1
Expert Answers •2

06/18/21

Chemistry Calculations

The average price for a gallon of gasoline in the US is 1.55/gallon. what would the price of gasoline be in Europe, where they charge you per liter? (1.00 L= 1.057 quarts, and 1.00 gallons = 4.00... more
Follows • 1
Expert Answers •1

06/18/21

DUE TODAY HELP!!!
Your response should be at least 5-7 sentences at a minimum. Question: A chemical reaction absorbs energy when occurring. Is this reaction Exothermic or Endothermic? If the enthalpy of the... more
Follows • 1
Expert Answers •2

06/17/21

Calculate [OH−] [ O H − ] in the following aqueous solution at 25 ∘C ∘ C : [H3O+]= 2.5×10^-2 M
Follows • 1
Expert Answers •1

06/17/21

Calculate the pH p H of each solution and indicate whether the solution is acidic or basic.
[H3O+]=5.3×10^-5M[OH−]=6.6×10^-3M
Follows • 1
Expert Answers •1

06/16/21

Significant figures

Carry out each calculation and report the answer using the proper number of significant figures . a. 65.4 * 0.21 b. 92.0/18 c. 840.8 * 0.4
Follows • 1
Expert Answers •1

06/16/21

Calculate how many moles in 90.4 grams Cl2
90.4 g Cl2 x ?/?=
Follows • 1
Expert Answers •2

06/16/21

Console the setup below and then calculate how many molecules are in 15.0 grams CO2
15.0 g CO2 x ?/? X ?/?=?
Follows • 1
Expert Answers •1

06/16/21

can someone please please please help me with this asap?
N2 + 3 H2 → 2 NH3Nitrogen reacts with hydrogen to form ammonia according to the balanced chemical equation above. For each of the following pairs of reactants, identify the limiting reactant and... more
Follows • 1
Expert Answers •1

06/16/21

can someone please help me with this asap please?
N2 + 3 H2 → 2 NH3Nitrogen reacts with hydrogen to form ammonia according to the balanced chemical equation above. For each of the following pairs of reactants, identify the limiting reactant and... more
Follows • 1
Expert Answers •1

06/16/21

How many molecules are there in 6.35 moles of ccl4?
Follows • 1
Expert Answers •1

06/16/21

Plz help! I am really stuck
What is the molarity of a solution prepared by dissolving 20.0 grams of NaOH in sufficient water to make a solution with a total volume of 2.40 liters? (5 points) 0.120 M NaOH0.208 M NaOH0.416 M... more
Follows • 1
Expert Answers •1

06/16/21

PLEASE HELP ME I AM DESPERATE PLEASE!!!!!!!
3 Cu  +   8HNO3  --> 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of water can be made when 102.3 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you... more
Follows • 1
Expert Answers •1

06/15/21

4NH3 + 5O2 = 4NO + 6H2O How many moles of NO are produced if 6.96 grams of NH3 react with an excess amount of oxygen?

Grateful for any help! If you could explain the work that'd be helpful as well!
Follows • 1
Expert Answers •2

06/15/21

4NH3 + 5O2 = 4NO + 6H2O If you made with 9.67 moles of H20, how many moles of NO were also produced?
Already balanced equation I keep getting this one wrong and I'm not sure if it's my setup or if I'm dividing something wrong. Grateful for any help given!
Follows • 1
Expert Answers •2

06/14/21

HELP DUE TODAY!!
What is the percentage by mass of the solution formed when 22.0 grams of HCl is dissolved in 90.0 grams of water? (4 points) A 24.4% B 22.48% C 19.6% D 16.7%
Follows • 1
Expert Answers •1

06/14/21

An unknown element X has the following isotopes: ⁵²X (86.50% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X (5.50% abundant). What is the average atomic mass in amu of X?
Follows • 1
Expert Answers •1

06/14/21

What is the atomic number for an element whose mass number is 78, which contains 38 neutrons per atom?
Follows • 1
Expert Answers •2

06/14/21

A 134.7 g piece of copper (specific heat 0.380 J/g･°C) is heated and then placed into 400.0 g of water initially at 20.7°C. The water increases in temperature to 22.2°C.

What is the initial temperature (in °C) of the copper? (The specific heat of water is 4.184 J/g･°C).
Follows • 1
Expert Answers •1

06/14/21

Chemistry calculation's

Calculate the approximate volume of a 1.50 mol sample of a gas at 15.0 ̊C and a pressure of 3.75 atm.a.1.73 L
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.